Doctor cleaning device



NOW 24, l931- J. E. woODBuRY 1,833,767.

DOCTOR CLEANING DEvIE Filed Nov'. 11.,4v 1929 `s sheets-sheet 1 v ya yNOV. 24, 1931. E, WQQDBURY- 1,833,767

DOCTOR CLEANING DEV I-CE Filed Nov 1l, 1929 3 Sheets-Sheet. 2

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J. E. wooDBURY 1,833,767 44 'DOCTOR CLEANING DEVICE 5 Sheets-Sheet 3Filed Nov. 11. 1929,

I f Zi/ebs ,7a/1 .2505@7 Patented Nov. 24, 1931 Unirse Aemr-:EsPATfEcN-r lor12214111?. p

'Jon1vn.uvvoomsumr,` or: wonensmnr., MASSACHUSETTS lDooren.`cnnnnmennvrcn I f Y' Application led November11,;1929L1WSeria1iNo;;406,276.`

tor. in the position. the. ink is about ,-This'invention relates to theinking ofintaglio plates or dies in .a machinelfor linev printing.

'The principal objects ofthe invention are i 5 .to provide means forreducing the amount of ink used at each operati-on in Va machine of thistype; to provide means.' for cleaningwaV doctor after each inkingoperationv to remove the` surplus ink therefrom; vto provide meanslo'for engaging the 'doctor on its inked side at a distance' from itsscraping edge and ,moving over the doctor to remove' the'ink therevfrom;to provide means for supporting the doctor behind the scrapingIdevicernear its "15 edge, an'd to provide, theseelements in combination`withthe usual means for vibrating Ythe doctor while in operation inamachine in which, the die or, plate is vpositioned Vwith its printingside up. Y' 1 Other objects and advantages ofthe invention will. appearhereinafter. I leference is to be had tothe accompanying drawings,inwhich v V1 .-isfa side view of anintaglio printing-machine, with apreferred embodiment of this invention applied' thereto and: shown in.printing position 'Fig 2 isa plan of: he rdoctor andshaftffor supportingit,.as.indicated by thearrow 2 iny Figil, showing` adjacent parts insection; v

Fig. ,3 is an end view-ofa kpart of the'doctor vibrating device, asindicated lby the =ar row 3 AinFig. l; y

Fig. Lis Aa sectional view onthe line L41 oflig. l;

Fig. 5i is-avertical sectional view through the press, of the diecarriage showing the operation ofv printing,'v the .parts being in* thesame position asy inF-ig.' l;

IFigsnand? are-side elevations -of two of the camsemployed; l

Fig. 8 isa sectional view: of the die chuck land associated parts,illustrating the v. position of the doctor while the first coat ofinkisI being applied to the die Y ,Fi-g. :isa` sim-ilarviewshowing thedievmoving in i the` 'opposite direction Y and the doctor in position forremovingthe 'surplus link; I

to be removedfrom'it, :and themean's lfor f moving theldoctor scrapingblade.;Y ,and

lF ig. ll is aI vsectional view of the tank yfor holding the ink removedfrom the doctorfand showing the Wayin which'it, isfsnpported.

It lis customary to. make v`printing' presses of the die stamping type,Vwththefde the pressrface.up,so that theprint ismade` on 'fit thelowerface of the` sheetasztlieson: the feed table of, the press.".'Itisalse customary to pass thedie .under a cushioned, pad coveredwitha die wiping :pa-per. whichremovesall the inkffronn the.y face.of-.the die preparato@7 f .to printing. VThis system has long beenVopen to Serious criticism"` becausea relatively. large v'amount ofir'ikis.wasted.atY eachprinting operation .andalso 1a'. largefpiece l.ofdie a wiping paper,Y .is required for` each' print. `xThese two :if:items representen largean expenseithatsome eifortshave beenmadetosavezthisfwaste material. 'Asifar ask-IA .am .aware, these, efforts havebeenmostly inthe .direction of inverting the. vdie and providing adoctor. funderneath :which =slants .downwardlyand removes qthe ink fromthe plate or die andthen. Vdisposes type .ofl machineslirstdescribedfabove. :This however', involves considerable expense toestablish, in, .l a plant vfalreadyy,working `onV the ,type of machinesrst described above. This invention vis Vdesigned Jto .avoid thenecessity .of scrapping old machines .f and putting. vin theA inverted.typeandrto. provide. for `saving nthe Waste. ink/.inthefordinary*typeof: machine and also to save in the amount of-wipingpaper employed.' f

Referring to" Fig.V .55. this shows a'machine .of the 4ordinaay typewi-thi. this invention-- applied thereto. Y In this machine, there is adie itil carriage 10 on Awhich-is located aj'chuck l1` vin 9 .which ismounted-1 their xprinting pla-te or 'die '12. '.Thesethreepartsxarerec-iprocated in the .directionoflthe-arrow. 'i-When intheposition shown the rant 13 risesan'd the palper-located on the 4die .ispressed-,against the counter 14:. TheA 'pri-nt isnmade on thej lowerface. .of-the sheet .between ythe die l2 .and the counter 14.

Accordi-ng tof this inventionr-atransverse horizontalcshaft 15..isemployed which carries fi a doctor 16. This doctor is so located that itcan act on the die or plate 12 in the manner shown in Fig. 9, while thedie is passing back to its printing position. It will be understood thatfirst the die moves as indicated in Fig. 8 with an inking roll 17irl-contact with it and the doctor out of contact with it, as shown inthat figure. Then when it moves back, the doctor comes down on the plateand scrapes the ink from it on its last motion toward printing position.The ink gathers on top of the lower edge of the doctor 16 and thisinvention has to do with the removal of that ink before the next inkingoperation. It is found in practice that the amount of ink left on thedoctor 16-is so small that'it will not run off and cause any trouble ifit is wiped ,off after each inking operation, although if left onwit-hout wiping for several operations, it will begin to drip ofil Vandcause trouble for that reason. Y

For the purpose of operating this machine, two shafts 20'and21are used.Although the gearing is not shown herein, it will'be understood thatthese shafts are connected with each other and with the shaft whichcontrols the reciprocation of the die chuck so that they work in acertain sequence. The shaft 2O oscillates whilethe shaft 21 rotates.

'The shaft 21 is provided with a gear 22 meshing with a pinion 23 on ashaft which has a crank 24 operating a link 25. `This link is vconnectedwith an arm 26 fixed on a shaft 27 provided with a fixed arm 28.Therefore, a rotation of the shaft 21 will swing this arm 28 back andforth. When it is swung inwardly toward the frame of the machine, itpushes the shaft 15 with it, and when it swings back,

la spring 29 brings the shaft back again.,V This of that shown and tothedotted lineposition in Fig. 1;

At the top of this link 34 is connected ak spring 36a also connectedwith the top of the Aarm 31 for holding the roll 32 upwardly as faras'it will go and with yielding pressure on the print-ing plate when inkcontact with it.

To the top ofthe link`34 is connected another link 37 which is pivotedto the short arm of a bell crank 38 pivoted on the frame of the machine.This bell crank is normally vheld down at its front end by a spring 39and is provided with a pivoted link 40 'which is ypivotally connected toanotherbell crank 41 carrying uanother cam roll 42. On the shaft 21 is acam 43 having two circular arcuate Vgoes down'with it and forces theroll over the rounded end of the cam to the dotted line positioninFig. 1. Also the link 37 is pulled down as indicated and the link 40also moved downto inove the roll 42 into contact with the cam 43, but atpresent this is on the part of the cam which has the larger radius. Theeffect of the ycam is to move the doctor far back to an inclinedposition and the effect of the cam 43 at this time isto hold it in theposition shown in Fig. 8 where it does not touch the plate and keep itin that position until the cam 43 rotates around to bring the lower partof its cam surface into registration with the roll 42. This allows thisroll to move inwardly further, urged by the spring 39. This results inswinging the link down a little more and moving the link 37, and with itthe link 34, backwardly away from the guide surface 36. The real effect,however, is to bring lthe cani 35 a little back of its dottedlineposition and to allow the roll 32 to move withit so as to bring thedoctor 16 down on the die 12 as shown in Fig. 9. The doctor is heldagainst the inked die by the spring 36a.

Pivotally mounted on brackets 45 carried by the die carriage 10 is adoctor cleaning frame 46. This frame carries a small receptacle or tank47, which is provided, projecting up from the top, with an inverted L-shaped stop 43 adapted to come up back of the doctor, as shown in dottedlines in Fig. 10, and back up thev doctor while it is being cleaned. Thetank 47 is held in place on the ,frame 46 by springs 44.

4Also mounted on this frame 46 is a shaft 49. Two arms 50 and 56 arefixed on this shaft. To the arm 50 is pivotally connected a link 51carrying a rotatable stud 52 to which is secured a bar 53. This bar isalso secured to an oscillatable shaft 54 located on the frame 46 andcarrying fixed thereto a scraper blade 55. It will be seen that thisshaft 54 with its scraper blade can be turned and by the link 51.

On the shaft 21 isa cam 57, which by means of a roll 58, pivoted arm 59,and link 60, operates the arm 56 and the scraper blade 55.

The doctor cleaning frame 46, as previously stated, is pivoted at 61 andis adapted to be raised and lowered about this pivot by a link 62 whichis operated by a lever 63, roll 64 and cam 65 on the shaft 21. Byraising the scraper blade will lrise'above the bottom" scraper bladecarried byfsaid frame, meansV for lifting said frame-to a position inwhich of the doctor, and means ffor swinging the scraper blade against:the doctor, 'whereby thescraper blade will move down along the surfaceof the doctoras the f frame moves y down, to remove the ink yfrom thedoctor.

11. In an inking device,rthe combination with a` doctor for removing thesurplus ink from an intaglio die or printing plate,a shaft on which saiddoctorismounted, means Vfor turning theshaft from a position in whichVthe doctor engages the printing plate toa position wien, the doctorhanging down from 4the shaft, a frame hung pivotally, a scraper bladecarried by said frame, and movable bottom of-` the doctor, and meansoperated by the other zam for swinging the scraper blade against thedoctor, whereby the scraper blade fac' will move down along thefsur'face.of the 'doofv tor as theframe movesfback, to remove thel ink from thedoctor.

12; In an, inking .doctor to ia vertical position'with its operativeedgeVV down, of a movable frame, af shaft pivoted on said frame,` alinkconnected with, said shaft to ,be operatedgthereby, a scraper blade,connected with the lirikmotionfand' movable to two positionsinone-fof.which` it: -v

isback away frointhe doctor and-intheother it is up in position foritsvedge to enga-ge the Asurface of the doctor on vwhich the inkiscolvlected,.means for operating saidlink motion. and' means for`moving' said fram'elup' andv down to cause the scraper blade by saidcombined operating means to rise and move against the surface of thedoctor and then descend vertically to scrape the ink from the doctor.`

,i 13. In an inking device, the combination l with a chuck forsupporting a printing plate or die and means for'reciprocating saidchuckV in a direction parallel with the, `top printing 50 faceof thedieof means for'inkiiigthe die as"` y v it reciprocates, an oscillatorysha-ft,.]`a link connected with said shaft, af guideffor the link, acamonthelink, a shaft, a doctorbla'de for the die mounted-onsaid'shaft,acam roll' having its axis fixed withrespect to said shaftand adapted to operatey the shaft when `thecarn roll is engaged bysaidcam'due tothe Aoscillation of said arm, c f l 'Y 14. Invaninkingdevice for intagliofprintQ ing plates, the Vcombination with"means forreciprocating the plate and an inkingvdevice `for applying inkthereto, ofa doctormonnted in position to scrapeth'e ink from the plate,a shaft on which tliedoctor is located,"a roi- V Y, tary cam having twoarcuate surfaces,fone,.

up away from the printing plate varid"down inked, a shaft ,on which thedoctor is located, l

y l Y Y n n yieldingpressure,wherebyjwhenfthe device y the' y @mbmtio lheld aganstitsffcam, that cam. will? posiii-,Wely l4V with aldoctor`andl means-for .tnrning'the "this i roll engagesyjand yyielding fmeaVholding the rollfagainst Vthisv Cain,

second link, a third;l link extending fromthe j Y @fthez'jdoctorl bladewitlirespect tothe printingl f VLsuirfm of thedie.' i f `f @areiowa-eageofahei doctor, and massif@ p Y 1 1turningthe scraping bladethedQ ,1;912",y 1

V the first namedrfmeans Lacting; to y draw fthef itc-"remove inktherefrom.' f

against the 'camgan oscillating arm, a link i connectedto said arm; aVcam on the linkfor i i,

oscillatingkthe doctor shaftto 'turn thedct'or,` r

on its surface alternately as thel arm oscillates and meansoperat-edby'saidcam rollfr. hojldlrv ingthe blade in its two extreme positions;.i 1 15;,Thecombination` with means4 for re-j ciprocating a printingplate-zandlan .inking T011 VOIV applying ink thereto' both onitsiforf'-lward and backward fmotionsfofl a doctor. mounted "inv position toVscrape the ink `from the plate onits reversemotionaftervit isVanfoscillating arm, a linkconnected tosaidryY 7 arm, a: cam on they linkfor oscillating the shaft and the doctor toturnthe doctor npV away fromthe,print'ing'plate` and downionp i its vsurface alternately;asthearmloscillates, g v a rotatablefcam havingaliighapdlwpgur;

face, a bell-"crank havingja 'fr ollf,v thereon iadaptedtoengagethe'lastnamed campmeansf". t l

connected with said 'for opefratin" a th bell-cr'ankltohold it against`the cam i ll-,is 1.

locate the doctor either against the printing f plate' or inanV'elevatedposition away itV vaccording towhich surface V:ofthe rotarycam ,-forf:

16:; rhe-,comiginaeoa wahratiruckjfef Stip;

porting ja printing pla-te or 'die `and'lm'eans#for reciprooatingsaidchuck in fab vv'dirlectioii parallel with the upper printinggfacefof thedie, of lmeans for inking' the'. die'. as!itfjre-jv ciprocates, f anoscillatory shaft, a link fjcn'ai nected lwith saidfshaft, arguidejforthevflink, a ,spring,holding'thelinkagainst thefguide,,` l v y a cam onithelink,A a shaft,a,doctorforfthedie` mounted on said yshaftf,a camroll on `Vsaid shaft, a link extending from; the `first named' 1opposite arm ofthegbell-cranhfa rotary cam,l

and a cam roll operated. `by therlast named Y linkto`,engagesaidrcftarly cam,.wherebytheVV y cano will positively determinethe Vposition oflel'fl 't .ll'7j.*j111f.an'` inking device, thecombinatio with;a,doctoradapdtofremove the inlrfrifjrn a rrietee PlataniScraprfblade; means formovingfthefscraper blad/esto apoint above;

scraper .blade along the {Surface-.ofthedoetorj 125.

V-Inj'testimon whereof,j If have; rhere'urito afiiXed'Ymysignature.,:y j1 -1

